gecko-dev/grendel/calypso/util/NullEnumeration.java

47 строки
1.3 KiB
Java

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil -*-
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Grendel mail/news client.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1997 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
/**
* This just returns an enumeration which never has anything in it.
*/
package calypso.util;
import java.util.Enumeration;
import java.util.NoSuchElementException;
public class NullEnumeration implements Enumeration {
public static final Enumeration kInstance = new NullEnumeration ();
protected NullEnumeration ()
{
}
public boolean hasMoreElements() {
return false;
}
public Object nextElement() throws NoSuchElementException {
throw new NoSuchElementException();
}
}